package com.gticket.cinemauser.config;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;

import java.lang.reflect.Method;
import java.time.Duration;

@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){
        //设置缓存有效期一小时
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofHours(1));

        return RedisCacheManager.builder(
                RedisCacheWriter.nonLockingRedisCacheWriter(
                        redisConnectionFactory)).cacheDefaults(redisCacheConfiguration).build();
    }

    /**
     * 返回自定义的key生成器
     * @return
     */
    @Bean
    public KeyGenerator myKeyGenerator() {//最终生成的key大概是：com.demo.SpringCacheDemofindAlljava.lang.String&a&java.lang.Integer&1&
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());// 获取类名
                sb.append(method.getName());// 获取方法名
                for (Object obj : params) {// 获取方法参数列表
                    sb.append(obj.getClass().getName());// 获取参数类型
                    sb.append("&");
                    sb.append(obj.toString());//参数值
                    sb.append("&");
                }
                return sb;
            }
        };
    }

}
